Full range single driver speaker, pros and cons?

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#41
planet10 said:
Even our most modest FASTs seem to handle almost everything with aplomb.

dave
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Can you approximate about what db level your experience was?

I have a couple of Eminence lab 12 subs id like to try with a fast system.
Ive had good luck with them crossed over high with my 2 ways (2nd order 150hz), although that may not be very high for a FAST.

I'm considering using alpai7p's, in a sealed box with an F3 of around 115hz, as sort of a built in high pass.
 
#42
Even if sealed, I'd still be inclined to include some HP filtering on the Alpairs - any relief from heavy lifting below 250 -300 would yield benefits of greater dynamic range and less distortion.

I think I've had every FAST to which Dave is referring in my own system at some time or the other, and they are almost never playing above 90-93dB SPL at 3 meters ....plenty loud enough for me these days. Any louder and my tinnitus rings / modulates for hours afterwards.
 
#43
chrisb said:
Even if sealed, I'd still be inclined to include some HP filtering on the Alpairs - any relief from heavy lifting below 250 -300 would yield benefits of greater dynamic range and less distortion.

I think I've had every FAST to which Dave is referring in my own system at some time or the other, and they are almost never playing above 90-93dB SPL at 3 meters ....plenty loud enough for me these days. Any louder and my tinnitus rings / modulates for hours afterwards.
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That would be plenty loud for me as well. I listen at about that same distance or less.

Would one of those "f-mod" line level (passive) crossovers be an option?
They are meant to be used after the source/ahead of the amplifier. They look kind of like an RCA jack with no wire, just male to female.
 
#45
#46
chrisb said:
As I understand it, F-Mods are essentially a PLLXO (in-line cap & maybe resistor?) but you could probably do better with a simple "black box" of your own, or even cap at input of amp stage driving the Alpairs.
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FMODs are compromised PLLXOs (1 size fits all). A PLLXO optimized for your amplifiers will be better & cheaper (especially if built into cables -- RCAs to make it pluggable often significantly exceed the cost of the XO parts).

If you are going with a PLLXO some consideration of their limitations should go into the speaker design.

dave
 
#52
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